Chromium-zirconium-copper blast furnace tuyere small sleeve production technology

Abstract

The invention discloses a chromium-zirconium-copper blast furnace tuyere small sleeve production technology. The chromium-zirconium-copper is used to replace copper alloy ZCuSn2 so as to improve the thermo-conductive performance, strength, wear resistance and high temperature properties of tuyere tip, and prolong the service life of tuyere small sleeve. In the technology, beryllium-copper is added to perform final deoxidation other than phosphor-copper so as to prevent the impurity phosphor exceeding the standard and guarantee the thermo-conductive performance of copper alloy. The added beryllium-copper removes oxygen from copper and at the same time improves the high temperature antioxidant performance, thermo-conductive performance, strength and casting performance of copper alloy. Chromium and zirconium are added other than tin so as to improve the thermo-conductivity and strength of copper alloy. A LOGAS50 degassing block is used to eliminate the hydrogen in order to reduce the hydrogen content of copper alloy, thus the casting defects can be avoided, and the quality of tuyere small sleeve is improved.

Description

[0001] technical field [0002] The invention belongs to the production process of a small set of tuyere of a blast furnace, and in particular relates to a production process of a small set of a tuyere of a chromium-zirconium-copper blast furnace. [0003] Background technique [0004] The traditional production process of blast furnace tuyere small sets is electrolytic copper→melting→initial deoxidation of copper with phosphorus→alloying with tin→final deoxidation of copper with phosphorus→casting→forming. The copper alloy formed is ZCuSn2. The existing production process adopts phosphorus-added copper for final deoxidation, and it is difficult to control the residual amount of phosphorus to not exceed 0.03% during the smelting process, generally within the range of 0.05%-0.10%. Phosphorus content exceeds the standard, which greatly reduces the electrical conductivity of copper, so its thermal conductivity is also greatly reduced. In addition, the purpose of adding tin i...

AI Technical Summary

Problems solved by technology

The existing production process adopts phosphorus-added copper for final deoxidation, and it is difficult to control the residual amount of phosphorus to not exceed 0.03% during the smelting process, generally in the range of 0.05%-0.10%

Phosphorus content exceeds the standard, which greatly reduces the conductivity of copper, so its thermal conductivity is also greatly reduced

In addition, the purpose of adding tin in the smelting process is to improve the fluidity of copper liquid, to improve the casting performance of the tuyere sleeve, and to eliminate casting defects, but it also reduces the thermal conductivity of red copper.